1.苏州科技大学 土木工程学院，江苏 苏州215009;2.河海大学 工程力学系，南京211100;3.江苏新亚勘测设计有限公司，江苏 苏州215137
吴恺（1997—），女，硕士研究生，主要从事边坡工程研究，（E-mail）1149045917@qq.com。
沈峰，男，副教授，博士，（E-mail）shenfeng1023@163.com。
TU528
国家自然科学基金资助项目（12172121,51709194)；江苏省产学研合作项目(BY2022570);河海大学岩土力学与堤坝工程国家教育部实验室开放基金项目；江苏高校优势学科建设工程资助项目；江苏高校“青蓝工程”资助项目；苏州市建设系统科研项目。
1.School of Civil Engineering, Suzhou University of Science and Technology, Suzhou, Jiangsu 215009, P. R. China;2.Department of Engineering Mechanics, Hohai University, Nanjing 211100, P. R. China;3.Jiangsu Xinya Survey & Design Co., Ltd., Suzhou, Jiangsu 215137, P. R. China
Supported by National Natural Science Foundation of China (12172121，51709194)，Projet on the Integration of Industry, Education, and Research of Jiangsu Province (BY2022570), Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, the Priority Academic Program Development of Jiangsu Higher Education Institutions，Qinglan Project of Jiangsu Province, and Suzhou Construction Research Project.
降雨入渗会影响城墙稳定性，最终导致城墙失稳坍塌。文中以城墙为研究对象，通过试验得到了土体的物理力学特性和非饱和特性，以试验数据为基础得到了以含水率为变量的抗剪强度公式，基于Bishop法得到安全系数的表达式。对不同工况下城墙边坡进行渗流场有限元分析与稳定性评价，并对梅雨季城墙稳定性变化及孔隙水压力分布进行分析。结果表明，随着降雨的不断进行，孔隙水压力逐渐增大，表层土体开始饱和，前期入渗深度不断增加，后期地下水位上升。梅雨季城墙稳定性持续下降，受降雨总量和降雨时长影响较大。研究成果可为区域典型气候条件下的该地区城墙修缮等工程的设计与施工提供理论参考。
Rainfall infiltration can affect the stability of the city wall, eventually leading to instability and collapse. This study focuses on the city wall as the object of study and investigate the physical and mechanical properties as well as unsaturated properties of the soil through experiments. Based on the experimental data, a shear strength formula with variable water content is derived, and the safety factor expression is obtained using the Bishop method. Finite element analysis and stability evaluation are conducted on the seepage field of the city wall slope under different working conditions, and the stability change of the city wall and the distribution of pore water pressure during the plum rain season are analyzed. The results show that with the continuous progress of rainfall, the pore water pressure gradually increases, the surface soil begins to saturate, the depth of infiltration continues to increase in the early stage, while the groundwater level rises in the later stage. The stability of the city wall continues to deteriorate during the rainy season, greatly affected by the total amount and duration of rainfall. These findings serve as a theoretical reference for the design and construction of the city wall repair and other projects in the region under typical regional climatic conditions.
吴恺,沈峰,李秉宜,章青,陈卫荣.降雨条件下城墙土水特性与稳定性研究[J].重庆大学学报,2023,46(8):88-100.
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